1921) REHDER, NEW SPECIES, VARIETIES AND COMBINATIONS 47 



minutely and sparingly appressed-pubescent; the branches of the in- 

 florescence with appressed or slightly spreading mostly pale hairs; pedi- 

 cels 1-4 mm. long, appressed-pubescent; ovary densely whitish appresse- 

 pubescent; calyx-lobes triangular and acuminate to ovate-oblong, ex- 

 ceeding the disk; petals oblong-lanceolate, 45.-5 mm. long, not or slightly 

 longer than filaments; style 3.5 mm. long, glabrous or with few scattered 

 appressed hairs, usually more or less thickened below the stigma. Fruit 

 sparingly produced, subglobose, 6-7 mm. thick, dark dull blue, appressed 

 setulose; stone distinctly broader than high, about 4 mm. high and 5 

 mm. broad, oblique, slightly compressed, slightly ribbed. 



Cultivated in Highland Park, Rochester, New York, and in the Arnold 

 Arboretum; specimens examined: Highland Park, August 29, 1919, 

 Horsey & Edson and July 13, 1920, Wm. L. G. Edson (No. 0-1104); 

 Arnold Arboretum July 13, 1920, and September 13, 1921, A. Rehder 

 (plants received from Rochester in 1916). 



This new hybrid originated like the preceding in Highland Park, Ro- 

 chester, from seed of C. macrophylla. From that species it differs in its 

 slenderer branchlets, the smaller and narrower leaves, pale or grayish 

 green, not whitish beneath, with fewer veins, in the presence of fulvous 

 hairs on the petiole and on the under side of the leaf toward the base, 

 the smaller slightly pubescent corymb and in the oblique stone distinctly 

 broader than high. From C. Amomum it differs chiefly in the larger, 

 long-acuminate leaves with more numerous veins, grayish green beneath 

 and with pale not fulvous-pubescent midrib and veins, and in the less 

 pubescent, somewhat larger and looser corymbs and darker-colored 

 fruits. From the preceding hybrid, C. Dunbarii, it differs chiefly in the 

 more spreading habit, more glabrous leaves smooth above, grayish green, 

 not glaucescent beneath, in the glabrous or nearly glabrous longer style 

 more or less thickened below the stigma, and in the larger, darker-colored 

 fruit with the oblique stone distinctly broader than high. 



This hybrid is not quite as handsome as C. macrophylla, but like the 

 preceding hybrid apparently hardier and therefore to be recommended 

 for regions where C. macrophylla is not hardy. Which of the two hy- 

 brids is to be considered superior in regard to its ornamental qualities 

 remain to be determined; judging from the herbarium specimens C. 

 Dunbarii seems to be a more vigorous shrub with larger leaves, while C. 

 Horseyi seems to be more showy when in flower. 



Hybrids of C. macrophylla possibly occur also in European gardens 

 In the Botanic Garden at Muenden, Germany, I collected in 1895 a speci- 

 men named C. macrophylla which may be a hybrid between C. macro- 

 phylla and C. sanguinea, and in the Jardin des Plantes at Paris I found in 

 1901 a plant cultivated as C. Thelycrania which is probably of similar 

 origin. The original Cornus Thelycrania is a synonym of C. macrophylla 

 and a plant collected in Kew Gardens by G. Nicholson in 1882 under 

 the probably corrupted name C. Theleriana is typical C. macrophylla. 



